In running exercise, several studies have determined the relation between velocity at VO2max (vVO2max) and running performance. However protocols for data collection and definitions used in the calculations of vVO2max have differed between studies. The purpose of this study was to determinate the power output at VO2max (poVO2max) in a cycling exercise, using different procedures commonly used in running determination. poVO2max was determined in 10 cycling males athletes (age 23.5 ± 2.9 years; weight 66.2 ± 7.5 kg; VO2max 65.0 ± 7.5 ml.kg-1.min-1) as (a) the power output at which VO2max was attained in a work-incremented cycling ergometer test (Quinton - Corival 400), (b) the ratio of VO2max to the oxygen cost of submaximal cycling (Co) and (c) the ratio of (VO2max - VO2 at rest) to (Co - VO2 at rest). Results of ANOVA suggested that there were no significant difference among the values derived using three different methods (a = 300.0 ± 16.6 W; b = 308.3 ± 22.5 W and; c = 322.1 ± 23.1 W). However, there were no significant correlations among the various pairs of values (a vs. b : r = 0.41; a vs. c : r = - 0.27 and; b vs. c : r = 0.31). In agreement with previous studies performed in the running, it was verified that poVO2max in cycling exercise can be different when distinct parameters described in literature are used. Researchers involved with the concept of poVO2max must be aware that the way of defining and determining this index, can have a considerable effect on its application.
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